This issue often affects users who previously had V-Ray installed on their machine.
After installing SketchUp Studio, users try to access V-Ray in SketchUp and see a licence error ('Failed to checkout a V-Ray for SketchUp licence'), as below.
This is caused by confusion within the V-Ray licence server that is running on the PC. Essentially, it's still looking for licences with a user's Chaos account - but these are now issued via Trimble.
Background
- When V-Ray is purchased within SketchUp Studio, the V-Ray licence is still issued by Chaos and V-Ray still needs the licence server (http://localhost:30304/) to run and check for the licence from Chaos.
- However, the V-Ray licence assigned to SketchUp Studio will not be in a normal Chaos account. Users will need to log in to Chaos with their Trimble ID using 'Continue with Trimble' (below).

Resolution
These instructions need to be completed in your default browser
If the user is logged to their Chaos licence server with their previous Chaos login, they will need to log out:
Visit the Trimble portal, view members and 'Modify Product Access' to remove Studio from the affected user.
Untick the Studio product from the user and save the changes.
Log out of Trimble.
Log back in to Trimble.
Reassign SketchUp Studio to the user.
Check if the licences are present in the
licence server (this only works if all steps are taken on the machine using SketchUp).
If your licence shows re-open SketchUp and access V-Ray, it should now pick up your licence.